Surprise, Arizona has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 59.6 °F (low) to 86.7 °F (high). Annual precipitation averages 9 Inches. Surprise is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.2 °F | 67.1 °F | 1.07 in. |
| February | 44.7 °F | 70.8 °F | 1.24 in. |
| March | 50.4 °F | 77.5 °F | 1.2 in. |
| April | 55.3 °F | 85.1 °F | 0.25 in. |
| May | 64.9 °F | 94.1 °F | 0.28 in. |
| June | 73.7 °F | 103.6 °F | 0.04 in. |
| July | 80.1 °F | 106.3 °F | 0.81 in. |
| August | 79.7 °F | 104.9 °F | 1.05 in. |
| September | 73.2 °F | 100.1 °F | 0.71 in. |
| October | 60.7 °F | 89.0 °F | 0.53 in. |
| November | 49.1 °F | 76.0 °F | 0.67 in. |
| December | 41.5 °F | 66.0 °F | 1.11 in. |
| Annual | 59.6 °F | 86.7 °F | 8.96 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BWh - Hot Desert Climate |